Thesis
A tuneable quantum gas for matter wave interferometry and soliton experiments
- Creator
- Rights statement
- Awarding institution
- University of Strathclyde
- Date of award
- 2020
- Thesis identifier
- T15691
- Person Identifier (Local)
- 201584876
- Qualification Level
- Qualification Name
- Department, School or Faculty
- Abstract
- The thesis reports on two strands of experiments in which we employ Bose-Einstein condensates of caesium atoms. Caesium provides favourable scattering properties due to a rich spectrum of magnetic Feshbach resonances at low fields. In particular, we take advantage of the tunability of the interaction strength to implement experiments to study matter-wave interferometry and solitons.;In a first series of experiments, we employ a magnetic levitation scheme and the tunability of caesium BEC to measure micro-g accelerations by using atomic interferometry, demonstrating free-evolution times of 1 s. We analyse the intrinsic effects of the curvature of our force field due to the magnetic levitation, and we observe the effects of a phase-shifting element in the interferometer paths.;In the second series of experiments, we exploit the tunability of our Bose-Einstein condensate to generate bright matter-wave solitons in quasi-1D geometry.We study the fundamental breathing mode frequency of a single matter-wave soliton by measuring its oscillation frequency as a function of the atom number and confinement strength and we observe signatures of the creation of secondorder solitons.;Aside from introducing some general concepts of ultra-cold atomic collisions and BECs, I also present a brief overview of the experimental apparatus. This includes details of the vacuum setup, laser cooling, magnetic field coils and diagnostic procedures, and sequence for generating BECs of caesium atoms.
- Advisor / supervisor
- Kuhr, Stefan
- Haller, Elmar
- Resource Type
- DOI
- Date Created
- 2020
- Former identifier
- 9912922288602996
Relations
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